Textile Chemistry and Coloration-I (TE-2105) question paper, University of Dhaka, 2018. Candidates work through water hardness, jigger dyeing, detergency mechanisms, enzymatic desizing, mercerization, and scouring of grey cotton fabric.
B. Sc. in Textile Engineering, Level-2, Term-1.
Final Examination- 2018
Course Code: TE-2105 | Marks: 60 |
Course Name: Textile Chemistry and Coloration-I | Time: 3 hours |
Answer any 5 (Five) from the following: (The figures in the right hand margin indicate full marks)
Marks
1. (a) What do you mean by the term “Wet Processing”? Draw a flow chart for wet processing technology.
3.0
(b) Define hardness of water. How can you identify temporary & permanent hardness?
3.0
(c) Mention the name of water softening methods & discuss any one of them with suitable sketch.
4.5
(d) If 2 ml EDTA is required for titrating 40 ml of water, then find out the hardness of water in German unit.
1.5
2. (a) What are the relationship between dyeing machine construction & liquor ratio? Show the comparative liquor ratio of winch, jet & jigger dyeing machine with reason.
3.0
(b) Describe the features & working principle of a jigger dyeing machine with suitable sketch.
5.0
(c) What do you mean by continuous & discontinuous process? Write down the features of a dyeing machine.
4.0
3. (a) Write down the preparation of soap with examples.
2.0